<template>
  <div class="wrapper">
    <swiper :options="swiperOption" v-if="showSwiper">
      <swiper-slide v-for="item of list" :key="item.id">
        <img class="swiper-img" :src="item.imgUrl" />
      </swiper-slide>
      <div class="swiper-pagination"  slot="pagination"></div>
    </swiper>
  </div>
</template>

<script>
export default {
  props: {
    list: Array
  },
  name: 'HomeSwiper',
  data () {
    return {
      swiperOption: {
        pagination: '.swiper-pagination',
        loop: true,
        autoPlay: true
      }
    }
  },
  computed: {
    showSwiper () {
      return this.list.length
    }
  }
}
</script>

<style lang="stylus" scoped>
//样式穿透 wrapper下面的指定样式不受scoped限制，
.wrapper >>>.swiper-pagination-bullet-active {
  background: #fff;
}

.wrapper {
  overflow: hidden;
  width: 100%;
  height: 0;
  // 高度相对于宽度撑开30%，实现宽高比自适应
  padding-bottom: 30%;
  background: #eee;

  .swiper-img {
    width: 100%;
  }
}
</style>
